Boomerang and launcher

ABSTRACT

A launcher for a flying object, such as a boomerang, is provided having a body that includes a plurality of wings. The launcher includes a stop against which the object rests at a point on its body. A moving member engages one of the wings of the object so as to impart forward motion thereto, such that the object is propelled forward from the launcher with a rotational moment about the stop. The boomerang is preferably made from a sheet of material which is cut to form the plurality of wings, joined at a vertex, wherein one or more of the wings are folded to produce lift flaps.

FIELD OF THE INVENTION

The present invention relates generally to toys and games, andspecifically to flying toys and methods and apparatus for launching suchtoys.

BACKGROUND OF THE INVENTION

The boomerang was originally invented by the aborigines of Australia asa hunting weapon. It typically comprises two mutually-angled wingsconnected at a vertex. The wings are shaped so that when the boomerangis thrown in the proper manner, it will describe a circuit and return tothe point from which it was thrown. Throwing the boomerang properly,however, requires considerable strength, coordination and skill. Thethrower must launch the boomerang with the proper combination of forwardand rotational momentum, using the muscles of his arm, hand, leg andtorso, in order to obtain the desired aerodynamic effect. Boomerangshave thus achieved limited popularity as toys, due to the difficultiesin throwing them and the danger that a misguided boomerang will strike aparticipant or bystander. Light-weight and very small boomerangs cannotgenerally be thrown with sufficient momentum to make them fly in acircuit.

Other flying toys known in the art, such as the Frisbee and other toysbased on propellers, parachutes and flying rings, also rely on acombination of forward and rotational momentum to develop lift. Suchtoys do not generally have the characteristic of the boomerang of beingable to return accurately to the point from which they were thrown.

European Patent Application EP071319 describes apparatus for launching aboomerang or other, similar article. A holder has a continuous slot forreceiving the boomerang, with a narrow end into which the vertex isinserted and a wide end for the wings. A striker strikes the vertexthrough an opening in the narrow end of the holder, thus propelling theboomerang forward. A stop at one of the sides of the wide end of theholder engages and restrains the tip of one of the wings, causing theboomerang to rotate around that tip as it moves forward out of theholder.

The boomerang launcher described in this European application suffersfrom a number of drawbacks: (1) Because of its fixed, partly closedmechanical structure, it is capable of accepting and launchingboomerangs only of a very limited range of sizes and wing angles. (2) Itincludes a large number of different parts, including several movingparts, which increase its cost and decrease its reliability. (3) Theslot into which the boomerang must be inserted restrains the boomerangat multiple points along its length, so that a part of the energyimparted by the striker is wasted in freeing the boomerang from thelauncher. (4) Further energy is wasted when the wing tip engages thestop, since force is exerted at this point on the boomerang in adirection more or less opposite to the desired flight direction. Onlythe other, unrestrained wing has forward momentum and can develop thelift necessary for the boomerang to fly. (5) Because the striker exertsa sudden, percussive force on the boomerang, the launcher cannot be usedwith boomerangs that are particularly small and flexible.

SUMMARY OF THE INVENTION

It is an object of some aspects of the present invention to provideimproved apparatus and methods for launching of boomerangs and otherflying toys.

It is a further object of some aspects of the present invention toprovide boomerangs and launchers that can be produced simply andinexpensively, with a minimal number of separate parts.

There is therefore provided, in accordance with a preferred embodimentof the present invention, a launcher for a flying object, such as aboomerang, having a body that includes a plurality of wings, thelauncher including:

a stop, against which the object rests at a point on its body; and

a moving member, which engages one of the wings of the object so as toimpart forward motion thereto, such that the object is propelled forwardfrom the launcher with a rotational motion about the stop.

Preferably, the moving member includes a resilient element, which ispulled back and then released in order to impart the forward motion tothe wing.

Further preferably, the launcher includes a generally planar base onwhich the object is placed before launching, wherein the stop and themoving element protrude from the base, wherein the base, stop and movingmember are most preferably made from a single sheet of material, whichis folded to form the stop and moving member.

There is further provided, in accordance with a preferred embodiment ofthe present invention, a launcher for a flying object, such as aboomerang, the launcher including:

a sheet of resilient material, defining a plane on which the objectrests before launching; and

a moving member, formed by folding a portion of the sheet, which engagesthe object and which is pulled back and then released so as to impartforward motion to the object.

Preferably, along with the forward motion, the moving member imparts tothe object rotational motion in the plane of the sheet.

Preferably, the sheet is partially cut and is folded to form the movingmember so that when the member is pulled back and released, it bendsabout an axis generally perpendicular to the plane of the sheet. Furtherpreferably, the moving member includes an extension of the sheet, whichis folded over itself and is then folded out of the plane and fixed tothe sheet so as to form an angle of approximately 90° thereto. Mostpreferably, the launcher includes substantially no functional elementsthat are not a part of the sheet of resilient material.

There is also provided, in accordance with a preferred embodiment of thepresent invention, a flying toy, preferably a boomerang, including asubstantially flat sheet of material, which is cut to form a pluralityof wings joined at a vertex, wherein one or more of the wings are foldedto produce lift flaps.

There is additionally provided, in accordance with a preferredembodiment of the present invention, a method for producing a flyingtoy, such as a boomerang, from a substantially flat sheet of material,including:

cutting the material to form a plurality of wings joined at a vertex;and

folding one or more of the wings to form lift flaps.

There is moreover provided, in accordance with a preferred embodiment ofthe present invention, a method for producing a launcher for a flyingobject, including:

cutting a sheet of resilient material so as to define a planar portionon which the object rests before launching and a movable portion; and

preparing one or more folds in the sheet, along which the movableportion of the sheet is folded to produce a moving member, which engagesthe object and which is pulled back and then released so as to impartforward motion to the object.

Preferably, the sheet is cut so that when the portion is folded, themoving member bends about an axis generally perpendicular to the planeof the sheet when the member is pulled back and released.

There is furthermore provided, in accordance with a preferred embodimentof the present invention, a method for launching a flying object, suchas a boomerang, having a body that includes a plurality of wings, themethod including:

resting the object against a stop at a point on the body of the object;and

bringing a moving member into engagement with one of the wings of theobject so as to impart forward motion thereto, such that the object islaunched with a rotational motion about the stop.

Preferably, bringing the moving member into engagement with the one ofthe wings includes pulling back and releasing a resilient element.

The present invention will be more fully understood from the followingdetailed description of the preferred embodiments thereof, takentogether with the drawings in which:

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic top view of a boomerang and a launcher, inaccordance with a preferred embodiment of the present invention;

FIG. 2 is a schematic top view showing stages in the launching of theboomerang of FIG. 1;

FIG. 3 is a schematic, pictorial view of the boomerang and launcher ofFIG. 1;

FIG. 4 is a schematic top view of a sheet of material that is cut forassembly of a boomerang launcher therefrom, in accordance with apreferred embodiment of the present invention;

FIG. 5 is a schematic top view of the launcher assembled from thematerial of FIG. 4;

FIG. 6 is a schematic, pictorial view of the launcher shown in FIG. 5;

FIG. 7 is a schematic top view showing details of a boomerang, inaccordance with a preferred embodiment of the present invention;

FIGS. 8 and 9 are schematic side views of the boomerang of FIG. 7;

FIG. 10 is a schematic, pictorial view of the boomerang of FIG. 7;

FIG. 11 is a schematic top view of a sheet of material that is cut forproduction of boomerangs therefrom, in accordance with a preferredembodiment of the present invention; and

FIG. 12 is a schematic top view of a sheet of material that is cut forproduction of boomerangs and launchers therefrom, in accordance with apreferred embodiment of the present invention.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

Reference is now made to FIGS. 1, 2 and 3, which schematicallyillustrate a boomerang 21 and a boomerang launcher 20, in accordancewith a preferred embodiment of the present invention. FIGS. 1 and 2 aretop views, while FIG. 3 is an isometric, pictorial view. In FIG. 2,boomerang 21 is shown in successive positions during launch thereof,represented by outlines 21 a, 21 b and 21 c.

Boomerang 21 comprises a single body made up of wings 31, which arejoined at a vertex 28. The preferred structure and method of producingthe boomerang are described further hereinbelow. Launcher 20 comprises agenerally flat sheet 22, on whose surface boomerang 21 rests beforelaunching. A stop 23 (or optionally, two or more stops) and a movingmember 25 protrude upward from sheet 22. Prior to launching, a tip 26 ofone of wings 31 rests against moving member 25, and the boomerang bodyrests against stop 23 at a point 27. It is noted that the position ofthe boomerang relative to the launcher is not fixed, and tip 26 can bemoved along to various positions along member 25, thereby varying anangle 18 defined between the wing and the member and altering the flightcharacteristics of the boomerang. It is further noted that theillustrated structure of launcher 20 is capable of accommodatingboomerangs of different sizes, shapes and vertex angles, unlike thelauncher described in the above-mentioned European Patent ApplicationEP071319. Boomerang 21 can even be launched in a reverse orientation,i.e., with vertex 28 pointing outward, rather than toward stop 23.

The parts of launcher 20 are preferably constructed by suitably cuttingand folding a single sheet of resilient material. A preferredimplementation of this type of construction is shown below in FIGS. 4, 5and 6. Alternatively, the launcher may be assembled from multiple piecesand/or types of material, or may be molded, preferably from a suitableplastic, as is known in the art. Optionally, the launcher includes ahandle 24. In the embodiment illustrated in FIG. 3, moving member 25comprises protrusions 29 and is anchored to sheet 22 and preferably tohandle 24 so as to provide mechanical strength when the member is bentin order to launch the boomerang.

To launch boomerang 21, a user places it on the surface of sheet 22, andrests it against stop 23 at the desired point 27. The position of theboomerang may be varied to create a longer or shorter lever arm betweentip 26 and point 27. The desired elevation, azimuth and tilt for launchare selected, as illustrated by arrows A, B and C, respectively, in FIG.3. Grasping handle 24, preferably between the thumb and forefinger, theuser pulls back a tip 32 of member 25, as shown in FIG. 2, and thenreleases it suddenly. Member 25 springs back and imparts a forwardmomentum to tip 26. As tip 26 begins to move forward, the boomerangsimultaneously acquires a rotational motion about point 27 on stop 23.The rotational and forward motion of the boomerang are imparted, aswell, to an opposite wing tip 30.

Thus, unlike the launcher shown in the above-mentioned EP071319 patentapplication, tip 30 is not restrained in any way, and substantially allforces exerted by launcher 20 on boomerang 21 are in the direction ofdesired motion. Member 25 contacts boomerang 21 at a point along wing31, rather than at the vertex of the boomerang as in EP071319.Therefore, the boomerang moves off the launcher efficiently, at highspeed, with both of wings 31 contributing to generate a strongaerodynamic lift.

FIGS. 4, 5 and 6 illustrate a boomerang launcher 40, in accordance withanother preferred embodiment of the present invention. Launcher 40 isfunctionally equivalent to launcher 20, described hereinabove, and partsof launcher 40 are labeled in the figures with the same referencenumerals as are used for the parts of launcher 20 that perform similarfunctions. Launcher 40 has the additional advantage, however, that it isentirely made out of a single sheet of resilient material, preferably aplastic, such as polypropylene, which is suitably cut and folded.

FIG. 4 shows sheet 22 as it is cut to shape and prepared for folding.Movable member 25 is made from a long, protruding extension 33, which ispartly cut away from the remainder of sheet 22. As shown in FIGS. 5 and6, extension 33 is folded over along a line corresponding to tip 32 ofmember 25, and is then folded up by 90° (out of the plane of the page).A slot at the end of extension 33 engages a corresponding slot on sheet22, so the member 25 is anchored firmly in place. In this configuration,the curved extension 33 provides mechanical strength and resilience.When member 25 is pulled back (downward in the perspective of FIGS. 5and 6), it bends about an axis perpendicular to the plane of sheet 22,and then snaps back when released to propel the boomerang forward.

In the configuration shown in FIGS. 5 and 6, launcher 40 is mostsuitable for use by right-handed people, who can grasp handle 24 intheir left hand and use their right hand to launch the boomerang. Alauncher that is convenient for left-handed people can be producedsimply by reversing the directions of the folds of extension 33 and stop23. When boomerang 21 is launched from this “left-handed” launcher, theorientation of wing tips 26 and 30 will be reversed relative to theorientation shown in FIG. 1. This reversal may alter the flightcharacteristics of the boomerang.

Reference is now made to FIGS. 7, 8, 9 and 10, which are schematicillustrations showing details of boomerang 21, in accordance with apreferred embodiment of the present invention. FIG. 7 is a top view.FIGS. 8 and 9 are side views, wherein FIG. 8 shows the boomerang as seenfrom a point adjacent to wing tip 26, and FIG. 9, from a point adjacentto wing tip 30. FIG. 10 is an isometric, pictorial representation.

Boomerang 21 is preferably made from a flat piece of flexible, resilientmaterial, such as polypropylene or Teslin (produced by PPG, ofPittsburgh, Penn.), which is preferably coated with a laminate on one orboth sides. The sheet is bent at folds 36 and 37, preferablylongitudinally and downwards by a small angle as shown in the figures,in order to produce lift flaps 34 and 35, which give the boomerang adesired degree of aerodynamic lift as it flies. A cut 38 is preferablymade in the adjoining wing, so as to enable flap 34 to be folded cleanlyand evenly. Flaps 34 and 35 may be adjusted to substantially any desiredangle, up or down relative to the plane of wings 31, to vary theaerodynamic properties of the boomerang. The flaps obviate the needencountered in boomerangs known in the art for the wings to have acurved or variable cross section or volume for aerodynamic purposes.

FIG. 11 is a schematic top view of a sheet 50 of the material from whicha plurality of boomerangs 21 are made, in accordance with a preferredembodiment of the present invention. The boomerangs are preferablystamped out of sheet 50 by a suitable die, as is known in the art,enabling simple, low-cost mass-production. Most preferably, folds 36 and37 are prepared by applying pressure and/or heat along the correspondinglines on sheet 50 while stamping out the boomerangs or beforehand.Typically, one or both surfaces of the boomerangs are printed with adesired image before stamping. Thus, substantially all of the processesinvolved in producing boomerang 21 (and likewise, launchers 20 and 40)can be carried out using standard equipment and techniques, well knownin the printing industry.

FIG. 12 is a schematic top view of a sheet 60 of material from which aplurality of boomerangs 21 and launchers 40 are made, in accordance withanother preferred embodiment of the present invention. Both theboomerang and the launcher are thus produced from the same sheet ofmaterial, in a single process. This embodiment is particularlyconvenient in terms of packaging and distribution, since it enables acomplete kit of one or more boomerangs and one or more launchers to becontained together on the single sheet 60.

To summarize, boomerangs and launchers in accordance with preferredembodiments of the present invention can be produced simply andinexpensively and are easy and safe to use, requiring no special skill.They require very little storage space or packaging volume, and can evenbe distributed as an insert in a publication. The boomerangs can be madein substantially any desired size and from any suitable material,including light, relatively flimsy materials, of a type that cannotreadily be thrown by hand or propelled using launchers known in the art,such as that described in the above-mentioned European PatentApplication EP071319. Compare to launchers known in the art, launchers20 and 40 propel boomerangs with high speed and efficiency, with minimalmechanical shock to the boomerang.

Although preferred embodiments are described hereinabove with referenceto a boomerang of a given shape and dimensions, it will be understoodthat launchers 20 and 40 are suitable substantially without change forlaunching boomerangs having different sizes, shapes and wing angles,unlike launchers known in the art. Launchers 20 and 40 may be used, aswell, for launching flying toys of different designs, such as“boomerangs” having three or more wings. With straightforwardmodifications, launchers suitable for propelling a variety of othersorts of flying objects may likewise be produced in accordance with theprinciples of the present invention. It will thus be appreciated thatthe preferred embodiments described above are cited by way of example,and the full scope of the invention is limited only by the claims.

What is claimed is:
 1. A launcher for a flying object, comprising: asheet of resilient material, defining a plane on which the object restsbefore launching; and a moving member, formed by folding a portion ofthe sheet, which engages the object and which is pulled back and thenreleased so as to impart forward motion to the object.
 2. A launcheraccording to claim 1, wherein the sheet is partially cut and is foldedto form the moving member so that when the member is pulled back andreleased, it bends about an axis generally perpendicular to the plane ofthe sheet.
 3. A launcher according to claim 2, wherein the moving membercomprises an extension of the sheet, which is folded over itself and isthen folded out of the plane and fixed to the sheet so as to form anangle of approximately 90° thereto.
 4. A launcher according to claim 1,wherein along with the forward motion, the moving member imparts to theobject rotational motion in the plane of the sheet.
 5. A launcheraccording to claim 4, wherein the flying object comprises a boomerang.6. A launcher according to claim 4, wherein the launcher comprisessubstantially no functional elements that are not a part of the sheet ofresilient material.
 7. A launcher according to claim 2, wherein thesheet of material is further cut to produce the flying object that is tobe launched by the launcher.
 8. A launcher according to claim 1, whereinthe sheet is molded to form the moving member.
 9. A launcher for aflying object having a body that includes a plurality of wings, thelauncher comprising: a stop, against which the object rests at a pointon its body; a moving member, which engages one of the wings of theobject so as to impart forward motion thereto, such that the object ispropelled forward from the launcher with a rotational motion about thestop; and a generally planar base on which the object is placed beforelaunching, wherein the stop and the moving element protrude from thebase, wherein the base, stop and moving member are made from a singlesheet of material, which is folded to form the stop and moving member,and wherein the sheet is partially cut to define the base, stop andmoving member before folding the sheet to form the stop and movingmember.
 10. A launcher according to claim 9, wherein the sheet ofmaterial is further cut to produce the flying object that is to belaunched by the launcher.